"that show that old rag&tube, non-transponder, non-GPS types are not responsible"
How will you deduce this information other than the rag and tube component from the reports?
If they havent got a transponder or use the radio how do you know they will be indentified on primary and even if they are, subject to a report?
Please dont misunderstand me I applaud useful statistics, I just wonder how you will obtain these from the published information.